JP6106717B2 - Device for operating table height adjustment - Google Patents

Description

  The present invention relates to a device for adjusting the height of an operating table comprising a lifting carriage that is movable relative to the chassis of the operating table. Furthermore, the invention relates to an operating table comprising such a device for adjusting the height of the patient support, the patient support being connected to the column head of the operating table, the column head height being adjusted by a lifting carriage. It can be adjusted.

  Prior to and during surgery on a patient placed on a patient support, the patient support is brought into a position that facilitates surgical intervention on the patient. Therefore, it is necessary to turn the patient support at a large angle. Furthermore, the height of the patient support on the operating table should be adjustable as wide as possible. The operating table also allows a very small height of the patient support, which ideally requires a simple structure of the operating table column.

  The following three different types of operating tables are typically used in hospitals: a stationary operating table, a movable operating table, and a mobile operating table. Stationary operating tables have operating table columns permanently fixed to the floor of the operating room, usually without the operating table base, and energy is supplied to them through a fixedly installed cable. With these stationary operating tables, the patient support can be easily removed and reinstalled and can be transported by a dedicated transport device. With this transport device, the patient resting on the patient support can be moved away from the operating room.

  The movable operating table has an operating table base connected to the operating table column that allows free adjustment of the operating room, and a patient support that can be removed from and attached to the operating table column. Have. The movement of the operating table column is carried out by the provided column transporter or in the case of a self-moving movable operating table by an integrated extractable transport roller.

  The operating table base of the mobile operating table includes rollers for moving the operating table so that they are moved without auxiliary means and are suitable for patient transport. In addition, with the mobile operating table, the patient support is usually fixedly coupled to the operating table column and is not separated from the operating table column for medical activities.

  A stationary operating table as well as a movable operating table or a mobile operating table is like an operating table column whose length can be adjusted by an electric motor to adjust the height of the patient support attached to the operating table column. An operating table column head that utilizes components that can be adjusted by an electric motor and is adjustable with respect to two orthogonal axes for tilt and swing adjustment of a patient support connected to the operating table column head and / or Or the components of the patient support can be adjusted by an electric motor.

  There is a need to support the operating table in a stable and accurate manner, especially during patient surgical intervention. For example, it should be possible to maintain external forces and torques resulting from changes in lateral force or patient position and the center of gravity of the patient support that does not move significantly. On the other hand, it must be guided in an accurate manner so that height adjustment is possible without obstruction of the elements provided for height adjustment.

  For adjusting the height of the operating table column, a sliding guide having a circular cross section as well as a non-circular shape is known. A great deal of manufacturing effort is required for the manufacture of guides having a non-circular cross section with only a small clearance. However, small clearances are required to achieve high rigidity of the operating table. The use of a sliding guide with a circular cross-section is disadvantageous in that the element sliding on the guide rotates about the longitudinal axis of the guide. In order to avoid such rotation, a key is provided which engages the groove and which is arranged on the sliding element or guide and provides a torque acting on the longitudinal axis of the guide. This makes production expensive and complex. In addition, the torsion protection distance is limited to the radius of the circular guide and requires a large guide diameter to achieve adequate stiffness. In the case of an alternative structure in which two circular guides are arranged parallel to each other, elements that slide on the circular guides tend to interfere when typical manufacturing and mounting tolerances are considered.

  It is an object of the present invention to specify a device for adjusting the height of an operating table that has not only an operating table but also a simple structure and that reliably provides even lateral force and torque.

  This object is achieved by the first aspect with the device having the features of claim 1 as well as the operating table having the features of claim 15. Advantageous developments of the invention are specified in the dependent claims.

  With such a device having the features of claim 1, it is achieved that the second guide and the first guide are formed as circular guides manufactured in a simple manner. The aforementioned problems with respect to obstructions or tilting of the lifting carriage with the mentioned circular guide are avoided by allowing a corrective action of the guide means. The corrective action corrects manufacturing and mounting tolerances. At the same time, the contact between the guide means and the second guide ensures that the second guide provides a guide function for the lifting carriage. The patient support is connected to the lifting carriage through other elements, such as a column head, so that the height adjustment of the patient support on the operating table is performed as the lifting carriage moves up and down.

  The vertical axis of the second guide and the vertical axis of the first guide are parallel within the manufacturing tolerance and the mounting tolerance. With the solution according to the invention it is achieved in particular that the function of the device is not influenced by the deviation of the parallelism of the longitudinal axes of the first and second guides unavoidable due to current manufacturing process tolerances. The guide means can correct the change in position of the second intersection point due to manufacturing and mounting tolerances. The path of displacement due to the contact area of the guide means in this connection is straight or bent. If the first guide is formed as a multi-part element or if the natural definition of the longitudinal axis is not possible, the longitudinal axis of the first guide is the guide through which the lifting carriage is guided during the lifting carriage lifting operation. Defined as an axis.

  When the second intersection point is moved from the first position to the second position, the position of the second intersection point is changed from the first position to the second position after the lifting operation of the lifting carriage before the lifting operation of the lifting carriage. It is further advantageous if the contact area of the guide means is moved with the second guide during the correction operation. As a result, the distance between the first guide and the second guide changes and the amount of distance between the two positions is corrected by the guide means. Preferably, the maximum tolerance for the parallelism of the first and second guides and the resulting change in the distance of the plane is corrected in the range from 0 mm to 3 mm, in particular from 0 mm to 1 mm, by connecting the guide means.

  The X axis is in a plane, the Y axis is in a plane orthogonal to the X axis, the first vertical axis and the second vertical axis intersect at the X axis, and between the first position and the second position The connection between the guide means and the chassis so that the length of the protrusion to the Y-axis at a distance of less than the length of the protrusion to the X-axis of the distance between the first position and the second position It is further advantageous if allows a corrective action along the path between the first position and the second position. This ensures that the lifting carriage stays in the second guide without clearance and pivots in the opposite direction about the first longitudinal axis, thereby achieving the required rigidity.

  Preferably, the path involves a functional connection between the X axis and the Y axis. This means that the path comes from the fact that each value on the X axis is assigned exactly one value on the Y axis. Preferably, the X-axis and Y-axis are axes in a two-dimensional Cartesian coordinate system, the coordinate system is clockwise, and the X-axis is the intersection between the vertical axis of the second guide and the plane on the X-axis. Elongates to have a positive value.

  If the X and Y axes are part of the coordinate system, the distance between the first position and the second position is determined by the x and y directions. Preferably, the distance in the y direction between the first position and the second position is 0% to 10% of the distance in the x direction. Due to the fact that the path of movement of the guide element between the first position and the second position is considerably smaller in the y direction than in the x direction, the user or patient of the lifting carriage can be recognized when correcting the distance tolerance There is no rotation with respect to the first longitudinal axis. For example, the first position of the second intersection point is defined by the intersection point between the second vertical axis and the plane before the lifting operation from the lowest position of the lifting carriage within the adjustment range. The second position is defined by the intersection point between the second vertical axis and the plane after the lifting operation from the lowest position to the highest position of the lifting carriage within the adjustment range.

  Further, when the lifting operation of the lifting carriage is within the adjustment range of the connection between the guide means and the chassis, the correction operation of the guide means can be performed only by a method in which the second intersection moves in a predetermined path on a plane. This is advantageous. As a result, higher rigidity of the operating table is achieved and obstructing the lifting carriage with the first and second guides is prevented by allowing proper movement of the intersection.

  The path of the trajectory is straight or in particular bent into a circle. Preferably, the trajectory is a planar one-dimensional path. In particular, the trajectory path has a greater share along the X axis than at the Y axis at any point in the path.

  Furthermore, in the case of movement in the x direction for correction of distance tolerances, the path of movement of the guide element is considerably smaller in the y direction than in the x direction and there is no visible rotation of the lifting carriage with respect to the first longitudinal axis. If so, it is advantageous.

  Furthermore, it is advantageous if the first guide comprises a guide bar and a guide bush arranged on the chassis, the first longitudinal axis being the axis of the guide bar. At each of the first end and the second end opposite the first end, the guide bar is fixedly connected to the lifting carriage and is moved with the lifting carriage during the lifting operation. The guide bar is fed through the guide bush in a sliding manner. Furthermore, the second guide comprises a guide element formed as a rod or cylinder barrel, each of the first end of the guide element and the second end of the guide element opposite to the first end to the lifting carriage. Fixed and connected. The guide element is provided through the contact area of the guide means in a sliding manner. As a result, a reliable guide of the lifting carriage is achieved by the first guide. In that respect, the guide bush of the first guide is preferably formed as a bearing bush. Furthermore, it is not necessary to provide a long guide element for the operating table, for example limiting the minimum lifting height of the patient support of the operating table. Furthermore, a reliable guide of the guide element is achieved by the second guide through a simple and robust structure and an aperture of the guide means.

  Furthermore, it is advantageous if the guide bar has a circular cross section with a diameter in the range from 25 mm to 80 mm, preferably 50 mm. The use of this type of first guide allows the lifting carriage without deforming or bending the guide bar to such an extent that there is a risk of disturbing the lifting carriage when performing a sliding movement along the first guide. Allows transmission of virtually any support force caused from the chassis to the chassis.

  Further, the main guide has at least one contact area where the guide bush contacts the guide bar, and the contact area of the first guide is parallel to the first longitudinal axis and has a length in the range of 120 mm to 210 mm, preferably 170 mm. This is advantageous. As a result, it is ensured that torque can be transmitted from the lifting carriage to the chassis with a small clearance.

  In a further development, the second guide is formed by a cylinder barrel which serves as a driving lifting cylinder for the lifting carriage, and one end of the lifting cylinder piston rod is fixedly connected to the operating table chassis. The Accordingly, no further elements are required for driving the lifting carriage based on the first guide and the lifting carriage drive. When the lifting carriage driving device is formed as a screw gear device, for example, the lifting carriage driving device is rotatably connected to the lifting carriage.

  Furthermore, it is advantageous if the guide means has a first aperture which forms a contact area of the guide means which is provided in a way that a part of the second guide slides. As a result, a reliable guide of the second guide is ensured in a particularly simple manner.

  Furthermore, it is advantageous if the first aperture of the guide means and a part of the second guide form a slide bush in which the second guide is movable along a first longitudinal axis relative to the guide means. As a result, a reliable guide of the second guide through the guide means is realized in a particularly simple manner.

  Furthermore, it is advantageous if the lifting carriage drive is a lifting cylinder, preferably a double acting and / or hydraulic cylinder, and is provided through the first aperture of the guide means in such a way that part of the outer surface of the cylinder barrel slides. is there. As a result, the lifting carriage drive lifts and lifts the lifting carriage in a more advantageous manner.

  In a particularly advantageous further development of the invention, the guide means is connected to the operating table chassis such that it can be pivoted about an axis of rotation parallel to the first longitudinal axis. At the neutral position of the guide means, the radial axis intersecting both the rotation axis and the second vertical axis which are in a plane and perpendicular to each other is parallel to the X axis. With this development, the corrective action along the X axis by the guide means is carried out in a particularly simple manner, and at the same time, the corrective action of the guide means relative to the operating table chassis along the Y axis is prevented or only possible to a small extent. . In other embodiments, the radial axis intersects the X axis within the range of 80 ° and 100 °, preferably 85 ° and 95 °.

  Further, in the correction operation of the guide means, the limit length of the protrusion to the X axis of the distance between the first position and the second position is a value in the range of 0 mm to 3 mm, preferably in the range of 0 mm to 1 mm. It is advantageous if it allows manufacturing and mounting tolerances to be limited. As a result, the movement length can be limited in a simple way.

  Furthermore, it is advantageous if the correction operation is permitted only by the connection of the guide means to the chassis during the lifting operation of the lifting carriage in a plane extending along a line connecting the first intersection and the second intersection. . This increases the rigidity of the lifting carriage with respect to torque in a plane perpendicular to the X axis, or its axis parallelism also maintains the necessary corrective action along the X axis.

  In another advantageous development of the invention, a first linear actuator and a second linear actuator are provided, and the lifting carriage is a first for adjusting the height and / or tilt of the column head of the operating table. Connected to the first end of the second linear actuator and the first end of the second linear actuator. By this means, the height adjustment of the column head and the tilt adjustment function of the column head can be advantageously combined. In that regard, the first and second linear actuators are preferably the only operative mechanical connection between the lifting carriage and the column head. The patient support of the operating table is connected to the column head by the up and down movement of the lifting carriage that causes the height of the patient support to change.

  A second aspect of the invention relates to an operating table comprising a device for height adjustment of a patient support according to claim 1 or the described development. In the operating table, the patient support is connected to the column head of the operating table, which can change the height of the column head through the vertical movement of the lifting carriage. By providing a height adjustment device as part of the operating table, the surgeon's typical needs for the operating table are met while ensuring the stability of the total system.

  Other features and advantages of the present invention result from the following specification, which describes the invention in more detail in connection with the embodiments relating to the enclosed figures.

The schematic of the operating table by 1st Embodiment is shown. FIG. 6 shows a detailed perspective side view of the operating table base and operating table column of the operating table without showing the operating table column covering element so that the guide means for guiding the lifting carriage drive are visible. FIG. 3 is a detailed perspective side view of a portion of the operating table base and operating table column according to FIG. 2 observed from the opposite direction of FIG. 2 with the other elements removed. FIG. 4 is a detailed perspective view of the arrangement according to FIG. 3. FIG. 3 is a schematic perspective side view of a first guide, a lifting carriage driving device, and guide means. Fig. 5b is an enlarged detail view of Fig. 5a. It is a perspective view of the guide means connected to a part of the operating table chassis. It is a top view of the cross section of the operating table support | pillar on a guide means. It is a perspective view of the other guide means for guiding a part of other chassis of other operating tables, other guide bushes, and the lifting carriage driving device according to the second embodiment.

  FIG. 1 is a schematic view of an operating table 10 according to the first embodiment. The operating table 10 includes a patient support 12, an operating table column 14, and an operating table base 16. The operating table column 14 includes a column head 18 and a base body 20.

  The patient support 12 includes a plurality of components that can be adjusted relative to each other to allow for different positioning of the patient (not shown). In the present embodiment, the patient support 12 includes a seat panel 26, a back panel 24, a head panel 22, a two-piece right leg panel 28, and a two-piece left leg panel 30.

  FIG. 2 is a detailed perspective side view of the operating table base 16 and the operating table column 14 of the operating table 10 where the covering elements of the operating table column 14 are not shown. Elements having the same configuration or the same function are indicated by the same reference numerals.

  The operating table column 14 includes a lifting carriage 40 slidable in the vertical direction by a lifting cylinder 34. The lifting carriage 40 is connected to the column head 18 and the patient support 12 connected thereto through two parallel linear actuators 42, 44. The vertical movement of the lifting carriage 40 leads to a change in the height of the column head 18 and a change in the height of the patient supporter 12 due to this.

  During the vertical movement for height adjustment, the lifting carriage 40 is guided by the circular guide bar 32 of the first guide. The guide bar 32 has a first vertically oriented longitudinal axis L1 along which a lifting carriage 40 is rotatably supported along which it is guided during vertical movement.

  The lifting carriage 40 includes a lower portion 41 and an upper portion 46. The top 46 is shown as a cross-sectional view in the vertical plane of FIG. The upper end of the guide bar 32 is fixedly connected to the upper part 46 of the lifting carriage 40, and the lower part of the guide bar 32 is fixedly connected to the lower part 41 of the lifting carriage 40. The chassis 38, also referred to as the base of the operating table column 14, includes a guide bush 33 provided to be supported in a manner that the guide bar 32 slides. The guide bar 32 provides virtually any lateral force acting on the lifting carriage 40 and guides them to the chassis 38 through the guide bushing 33.

  The lifting cylinder 34 is a hydraulic cylinder including a cylinder barrel 34a and a piston rod 34b. Inside the operating table base 16, the lower end of the piston rod 34 b is fixedly connected to the chassis 38 of the operating table column 14 so that the cylinder barrel 34 a can be extended upward. At the lower end, the cylinder barrel 34a is fixedly connected to the lower portion 41 of the lifting carriage via the connection region, and at the upper end, the cylinder barrel 34a is fixedly connected to the upper portion 46 of the lifting carriage 40.

  The vertical movement of the cylinder barrel 34 a during the actuating operation of the lifting cylinder 34 is guided by the guide means 36. Accordingly, the cylinder barrel 34a serves as a second guide. The longitudinal axis L2 of the cylinder barrel 34a is oriented parallel to the first longitudinal axis L1 within manufacturing and mounting tolerances. The second guide prevents rotation of the lifting carriage 40 with respect to the first longitudinal axis L1 and provides torque acting on the lifting carriage 40 with respect to the first longitudinal axis L1. In the present embodiment, the lifting cylinder 34 is formed as a double acting hydraulic cylinder 34. In other embodiments, other linear actuators are utilized as the lifting carriage drive 34.

  In the plane E, the flow is designated as the X axis, and when the guide means 36 and the cylinder barrel 34a are in the neutral position, the axis intersects the vertical axis L1 at the intersection S1 and intersects the vertical axis L2 at the intersection S2 at right angles. X is extended perpendicular to the vertical axes L1 and L2. Furthermore, the axis Y extends in a plane, is designated as the Y axis, and intersects the vertical axis L1 perpendicular to the X axis.

  The guide means 36 has a circular aperture provided with a cylinder barrel 34a of the lifting cylinder 34. The guide means 36 is rotatably supported on the chassis 38 through a pivot bearing 52 and is connected to the chassis 38 through a chassis 38 having a guide bush 33 and through a first screw connection 48 which is clearly visible through two screw connections. Is done. The rotation axis of the pivot bearing 52 is designated by Z and is parallel to the longitudinal axis L1 of the guide bar 32. The connection of the chassis and the guide means 36 through the two screw connections 48 and the pivot bearing 52 allows the movement of the cylinder barrel 34a in the plane E along the X axis with a limit length in the range of 0 mm to 1 mm. The construction of the first screw connection 48 and the second connection 50 will be described in more detail in connection with FIG.

  The guide means 36 is disposed at a neutral position of the guide means 36 where the radial axis R intersecting the rotation axis Z of the pivot bearing 52 and the longitudinal axis L2 of the cylinder barrel 34a is parallel to the Y axis. As a result, the cylinder barrel 34a of the lifting cylinder 34 cannot be moved along the radial axis R by the guide means 36 in the plane E along the radial axis R, or at least along the X axis. Guided by As a result, the force that acts on the Y axis from the lateral parallel in the lifting carriage 40 is guided to the chassis 38 through the cylinder barrel 34 a and the guide means 36.

  During the adjusting operation of the lifting cylinder 34 along the longitudinal axis L1, along the X axis of the intersection S2 of the longitudinal cylinder L2 of the lifting cylinder 34 having the plane E with respect to the intersection S1 of the longitudinal axis L1 of the guide bar 32 having the plane E. Inevitable movement cannot be prevented due to manufacturing and mounting tolerances. In the operating table column 10, the obstruction of the cylinder barrel 34 a by the guide means 36 of the lifting carriage 40 guided by the first guide can change the position of the intersection S <b> 2 from the first position to the second position. Thus, it is prevented by the operation of the aperture of the guide means 36 in the X-axis direction. By the guide bar 32 and the guide bush 33 of the first guide, the force acting on the X axis from the lateral parallel in the lifting carriage 40 is provided by the first guide and transmitted to the chassis 38.

  Each of the first linear actuator 42 and the second linear actuator 44 includes a cylinder barrel and a piston rod. Via the connection area, each of the cylinder barrels of the first linear actuator 42 and the second linear actuator 44 is received at the respective lower end of a dedicated flexible aperture provided in the lower part 41 of the lifting carriage 40, As a result, it is fixedly connected to the lower part 41 of the lifting carriage 40. Via the connection area, each of the upper ends of the cylinder barrels of the first linear actuator 42 and the second linear actuator 44 is received in a dedicated flexible aperture provided in the upper part 46 of the lifting carriage 40, and as a result And fixedly connected to the upper portion 46 of the lifting carriage 40. The upper end of the upward extensible piston rod of the first actuator 42 and the upper end of the upward extensible piston rod of the second actuator 44 are connected to the column head 18. The piston rod is not shown in FIG. Accordingly, the upper portion 46 and the lower portion 41 of the lifting carriage 40 are fixedly connected to each other through the cylinder barrel 34a, the guide bar 32, and the cylinder barrels of the linear actuators 42 and 44.

  FIG. 3 is a detailed perspective side view of the details of the operating table base 16 and operating table column 14 according to FIG. 2 as viewed from the opposite direction of FIG. The upper part 46 and the lower part 41 are shown in a vertical section. In addition to the elements that are clearly visible in FIG. 2, a second screw connection 50 of the guide means 36 is shown, whereby the guide means 36 is connected to the chassis 38. FIG. 4 is a detailed perspective view of the arrangement according to FIG. This figure shows in particular the fixing of the piston rod 34b of the lifting cylinder 34. The piston rod 34 b is fixedly connected to the chassis 38 and its lower end is connected to the operating table base 16.

  FIG. 4 further clearly shows the spatial arrangement of the guide means 36 relative to the X and Y axes of the plane E. The turning movement of the guide means 36 with respect to the rotation axis Z enables only a small movement in the region of the intersection of the lifting cylinders 34 having the plane E in the axial direction parallel to the Y axis, particularly in the case of a small rotation angle. During rotation of the guide means 36 with respect to the axis Z, the position of the intersection S2 of the longitudinal axis L2 of the cylinder barrel 34a preferably varies in the X-axis direction with a limit length in the range of 0 mm to 1 mm.

  FIG. 5 a is a schematic perspective side view of the guide bar 32, the cylinder barrel 34 a of the lifting cylinder 34, and the guide means 36. FIG. 5b shows an enlarged detail view of FIG. 5a. The cylinder barrel 34a of the lifting cylinder 34 is guided laterally by the guide means 36 so that the position of the intersection S2 of the longitudinal axis L2 changes in the plane E having a larger share along the X axis than the Y axis. In the first position, indicated by P1 in FIG. 5b, the intersection S2 of the longitudinal axis L2 is on the plane E on the X axis before the lifting movement of the lifting carriage 40. After the lifting operation of the lifting cylinder 34 is performed, the intersection S2 of the longitudinal axis of the cylinder barrel 34a, indicated by L2 'in the plane E, is located at the second position specified by P2 in FIG. 5b. The first position P1 is referred to as the aforementioned neutral position.

  During the lifting operation, the intersection S2 of the second longitudinal axis L2 moves along the direction of the arrow over the distance 53 in the plane E. The protrusion of the distance between the first position P1 and the second position P2 to the X axis is specified by PX, and the protrusion to the Y axis is specified by PY. In particular, the length of PY is shorter than the length of PX.

  FIG. 6 is a perspective view of the operating table column 14 showing the guide bush 33 provided on the chassis 38 and the guide means 36 connected to the chassis 38. In particular, the details of the first screw connection 48 and the second screw connection 50 are shown in this figure. A first disk spring 62, a first female thread 64 provided to the chassis 38 for receiving the first screw, a second disk spring 66, and a second female thread 68 for receiving the second screw. And are visible. Screws are not shown. The first disc spring 62 is arranged between the screw head (not shown) of the first screw and the support surface of the guide means 36.

  A first screw (not shown) is screwed to the first female screw 64 of the chassis 38. In that respect, the nominal diameter of the first screw is smaller than the diameter of the through hole formed in the guide means 36 so that the guide means 36 can move relative to the first screw. The lower side of the first disc spring 62 is pressed against the corresponding first support surface of the guide means 36 so that the guide means 36 performs a correction operation in the plane E with a limit length in the range of 0 mm to 1 mm. Can be slid on the support surface. The first support surface is formed by an aperture step provided for the first screw.

  A second screw (not shown) is screwed to the second female screw 68 of the chassis 38. In that respect, the nominal diameter of the second screw is smaller than the diameter of the through hole formed in the guide means 36 so that the guide means 36 can move relative to the second screw. The lower side of the second disc spring 66 is pressed against the corresponding second support surface of the guide means 36 so that the guide means 36 performs a correction operation in the plane E with a limit length in the range of 0 mm to 1 mm. The support surface can be slid so that The second support surface is formed by an aperture step provided for the second screw.

  This figure further shows the adjustment of the position of the guide means 36 relative to the X and Y axes by means of the indicated radial axis R. The radial axis R lies in the plane E and extends through the center of the pivot bearing 52 and the circular guide aperture 70 of the guide means 36. In the illustrated neutral position of the guide means 36, the radial axis R is perpendicular to the X axis.

  FIG. 6 further shows a through hole 72 in the guide bush 33 provided with a guide bar 32.

  FIG. 7 is a plan view of a section of the operating table column 14 on the guide means 36. In addition to the elements shown in FIG. 6, this figure also shows a first linear actuator 42, a second linear actuator 44 and a guide bar 32. This figure clearly shows the position of the guide bar 32, the lifting cylinder 34 and the guide means 36. The guide means 36 is disposed so that the radiation axis R is parallel to the Y axis. Accordingly, the cylinder barrel 34a is supported in a manner that does not slide along the radial axis R. Therefore, the lifting carriage 40 fixedly connected to the cylinder barrel 34a cannot rotate, particularly with respect to the longitudinal axis L1 of the guide bar 32. By the lifting operation of the lifting cylinder 34 guided by the guide means 36, the guide means 36 can move along the X axis on the plane E.

  FIG. 8 is a perspective view of a chassis 80 of a further operating table column 82 according to the second embodiment. The chassis 80 of the operating table column 82 is used in place of the operating table column 14, and is different in the structure of the guide means for guiding the lateral movement in the region of the intersection between the lifting cylinder 34 and the plane E. As in the first embodiment, the other elements of this second embodiment (they are not partially shown) are formed and arranged.

  In contrast to the first embodiment, the other guide means 74 is formed differently from the guide means 36. The guide means 74 is connected to the chassis 80 through the first bridge 76 and the second bridge 78. Preferably, not only the chassis 80, but also the guide bush 33, the bridges 76, 78 and the guide means 74 are formed entirely from one block of material or as a complete slab. In that respect, each of the longitudinal axes of the first bridge 76 and the second bridge 78 is arranged parallel to the Y axis. In particular, when the force is applied to the guide means 74 acting in the X-axis direction, the first bridge 76 and the second bridge 78 are configured so that the first bridge 76 and the second bridge 78 can be deformed to expand and contract. The two bridges 78 are formed more finely in the X-axis direction than in the Y-axis direction.

  The guide means 74 is provided with a guide aperture 70 provided so that the cylinder barrel 34 a can slide through the guide aperture 70 during the driving operation of the lifting cylinder 34. The cylinder barrel 34a provided through the guide aperture 70 is consequently movable in the plane E along the X axis by a distance having a limit length in the range of 0 mm to 1 mm. Thus, manufacturing and mounting tolerances, particularly regarding the distance between the cylinder barrel 34 a and the first guide, which appear during the extension of the lifting cylinder 34, can be corrected through the operation of the guide means 74. The first bridge 76 and the second bridge 78 are in the Y-axis so that when a lateral force is present, the cylinder barrel 34a and the lifting carriage 40 connected thereto are guided in a stable manner along the Y-axis. In particular, it does not perform any pivoting operation with respect to the longitudinal axis L1 of the guide bar 32.

DESCRIPTION OF SYMBOLS 10 Operating table 12 Patient support device 14 Operating table support | pillar 16 Operating table base 18 Support head 20 Base 22 Head panel 24 Back panel 26 Seat panel 28 Two-piece right leg panel 30 Two-piece left leg panel 32 Guide bar 33 Guide bush 34 Lifting cylinder 34a Cylinder barrel 34b Piston rod 36 Guide means 38 Chassis 40 Lifting carriage 41 Lifting carriage lower part 42 First linear actuator 44 Second linear actuator 46 Lifting carriage upper part 48 First screw connection 50 Second screw connection 52 Pivot bearing 53 Eccentric distance 54 1st aperture 56 2nd aperture 58 3rd aperture 60 4th aperture 62 1st disc spring 64 1st internal thread 66 2nd disc spring 68 Second female screw 70 Guide aperture 72 Through hole 74 Other guide means 76 First bridge 78 Second bridge 80 Other chassis 81 Additional guide bush 82 Additional operating table column L1 First guide longitudinal axis L2 Lifting cylinder longitudinal axis X X axis Y Y axis E Plane Z Rotation axis S1 First intersection point S2 Second intersection point P1 First intersection point P2 Second intersection point L2 'Lifting cylinder longitudinal axis Y' Parallel Y-axis RX moved to X-axis Projection to X-axis PY Projection to Y-axis R Radiation axis

Claims (15)

A device for adjusting the height of the operating table (10),
A lifting carriage (40) movable relative to the chassis (38) of the operating table (10);
Including a first guide (32, 33) having a first longitudinal axis (L1), the lifting carriage (40) being rotatable relative to the first longitudinal axis (L1);
Including a second guide (34a) having a second longitudinal axis (L2);
Including guide means (36), the guide means (36) connected to the chassis (38) of the operating table (10), the guide means (36) having a contact area, wherein the guide means (36) Means (36) contacts the second guide (34a) in the contact area of the second guide (34a);
The first guide (32, 33) and the second guide (34a) are within the height adjustment range of the lifting carriage (40) which is parallel to the first longitudinal axis (L1). It plays the role of guiding the lifting movement of the lifting carriage (40),
The plane (E) extending perpendicularly to the first longitudinal axis (L1) through the guide means (36) is a first plane in which the plane (E) intersects the first longitudinal axis (L1). An intersection (S1), and a second intersection (S2) where the plane (E) and the second vertical axis (L2) intersect,
The position of the second intersection (S2) is the position of the lifting carriage that is proximal to the first longitudinal axis (L1) during the lifting operation of the lifting carriage (40) within the height adjustment range. The second position (P2) after the lifting operation of the lifting carriage (40) distal to the first longitudinal axis (L1) from the first position (P1) before the lifting operation (40) of (40) The second vertical axis (L2) is moved in parallel along the eccentric path (53) on the plane (E) up to
The connection between the guide means (36) and the chassis (38) is realized by the guide means (36) being rotatably supported by the chassis (38) through a pivot bearing (52). The device is characterized in that the guide means (36) can be corrected so that the guide means (36) can rotate relative to the chassis (38) . While the previous SL correcting operation, the time of movement of said guide means (36) wherein the second intersecting point of the contact area is the first position from (P1) to the second position (P2) of (S2) a The device according to claim 1, wherein the device is moved with two guides (34a). The X axis (X) is in the plane (E), the Y axis (Y) is in the plane (E) so as to be perpendicular to the X axis, and the first longitudinal axis (L1) and the The second guide (34a) intersects the X axis,
The connection between the guide means (36) and said chassis (38), before SL Y-axis between the front Symbol first position (P1) and said second position (P2) (Y) direction moving distance (PY) so that shorter moving distance (PX) good remote before Symbol X-axis (X) direction between the first position (P1) and said second position (P2), wherein The device according to claim 2, wherein the correction operation along an eccentric path (53) between a first position (P1) and the second position (P2) is enabled. The connection between the guide means (36) and said chassis (38), before Symbol the correction operation of said guide means only during the lifting operation of the lifting carriage in a height adjustment range (40) (36) The device according to any one of claims 1 to 3, wherein the second intersection (S2) moves along an eccentric path (53) in the plane (E). The first guide (32, 33) includes a guide bar (32) and a guide bush (33) disposed in the chassis (38),
The first vertical axis (L1) is the vertical axis (L1) of the guide bar (32),
The guide bar (32) is fixedly connected to the lifting carriage (40) at each of an upper end and a lower end opposite to the upper end, and is moved together with the lifting carriage (40) during the lifting operation.
The guide bar (32) is fed through the guide bush (33) in a sliding manner,
The second guide (34a) comprises a guide element (34a) formed as a rod or cylinder barrel,
Each of the upper end of the guide element (34a) and the lower end of the guide element (34a) opposite to the upper end are fixedly connected to the lifting carriage (40),
A device according to any one of the preceding claims, wherein the guide element (34a) is provided through the contact area of the guide means (36) in a sliding manner. The device according to claim 5, wherein the guide bar (32) has a circular cross section with a diameter in the range of 25 mm to 80 mm. The first guide (32, 33) has a contact area where at least the guide bush (33) contacts the guide bar (32),
The contact area of the first guide (32, 33) has a length parallel to the first longitudinal axis (L1) within a range of 120 mm to 210 mm. device. The second guide is formed by a cylinder barrel (34a) of a lifting cylinder (34) that serves as a lifting carriage driving device,
The device according to any one of claims 1 to 7, wherein one end of a piston rod (34b) of the lifting cylinder (34) is fixedly connected to the chassis (38) of the operating table (10). The guide means (36) has a first aperture (70) that forms the contact area of the guide means (36), and a part of the second guide (34a) is the first aperture. A device according to any one of the preceding claims, provided in a way that slides through (70). A part of the first aperture (70) and the second guide (34a) of the guide means (36) form a slide bearing, and the second guide (34a) is formed by the slide bearing. The device according to claim 9, which is movable relative to the guide means (36) along a first longitudinal axis (L1). The lifting carriage drive (34) is a double acting and / or hydraulic lifting cylinder,
A portion of the outer surface of the cylinder barrel (34a) is provided in a sliding manner through the first aperture (70) of the guide means (36). The device of claim 10 to be cited. The guide means (36) of the operating table (10) is pivotable with respect to a rotation axis (Z) of the pivot bearing (52) which is parallel to the first longitudinal axis (L1). Connected to the chassis (38),
In the neutral position of the guide means (36) where the second intersection (S2) is at the first position (P1), the second intersection (S2) is at the plane (E) and the rotation axis (Z) and the second position ordinate respectively axis intersecting at right angles in (L2) (R), together with a perpendicular to the front Symbol X-axis (X) of claim 3 which is parallel to the Y axis (Y) device. The correction operation is possible by the rotational movement of the guide means (36) relative to the chassis (38) during the lifting operation of the lifting carriage (40) in the plane (E) extending along the X axis (X). The device according to claim 3. The lifting carriage (40) includes a first linear actuator (42) and a second linear actuator (44) for adjusting the height and / or tilt of the column head (18) of the operating table (10). The device according to claim 1, connected to a first end of each of the devices. An operating table (10) comprising the device according to any one of claims 1 to 14,
The patient support (12) is connected to a column head (18) of the operating table (10);
The operating table (10), wherein the height of the column head (18) is adjustable by the lifting carriage (40).

Images